<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
    <title>hhh</title>
</head>
<body>
<c:if test="${empty username}">
    <a href="/stu/login.jsp" >登录</a>
</c:if>
<c:if test="${not empty username}">
    <a href="/stu/addstudent.jsp">添加</a>
    <a href="/stu/listServlet">查看</a>
</c:if>
</body>
</html>
